Hi Paul,
The rules are located in the Sticky Threads at the top of the Marketplace section. Here are our Marketplace rules:
https://www.pentaxforums.com/forums/photographers-marketplace/137-important-i...e-posting.html
Summary of what you need...
Important Information and Regulations: Read Before Posting
Welcome to the PentaxForums.com Marketplace. In this unique forum, you can buy and sell new and used Pentax gear! You're welcome to list your equipment for sale anytime, but your account must meet one of the following conditions in order to do so:
-Donated any amount ($10 - $250) to PentaxForums.com in the past year
-Made 1,000 or more total forum posts
-Made 200 or more total forum posts, and been a member of the site for over 2 years
For now, I am removing your link since it's not allowed to be posted in the SLR Lens section. Let me know if you need further assistance.
Regards,
Marc